Cylinder-cock



(No Model.)

P. B. HOW. i CYLINDER 000K. No. 434.870l Patented Aug. 19, 1890.

M' Muunnnun INVENTER:

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FRED B. I-IOV, OF BOSTON, MASSACHUSETTS.

CYLINDER-COCK.

SPECIFICATION forming part of Letters Patent No. 434,870, dated August 19, 1890.

Application filed January 18, 1890. Serial No. 33 7,288. (No model.)

To all whom it may concern:

Be it known that I, FRED B. HOW, of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Cylinder-Oocks, of which the following is a specification.

This invention relates to cocks to permit the escape of water ot condensation from the cylinders of locomotive-engines, and particularly to cocksin which two connected valves in one easing are operated automatically by steam-pressure from the cylinder, so that the water of condensation from one end of the cylinder will be released by the automatic opening of the valve controlling` the outlet from that end by the pressure ot steam admitted to the other end of the cylinder, the said casing being connected by pipes with the opposite ends of the cylinder.

The invention has for its object to provide an automatic cock of this class of improved construction whereby compactness of form and efficiency of operation are insured, and to' provide improved means whereby the outlets from both ends of the cylinder may be left simultaneously open, if desired.

To these ends the invention consists inthe improvements which I will now proceed to describe and claim.

In the accompanying drawings, forming a part of this specitication7 Figure l represents a longitudinal section ot' a locomotive-engine cylinder provided with my improved cock. Fig. 2 represents an enlarged sectional view of the cock detached from the cylinder and showing its outlet-valve adjusted to permit the escape ot' water ot condensation only through the central channel. Fig. 3 represents a similar section, showing the outletvalve adjusted to permit the escape of water and steam from both ends of the cylinder simultaneously.

The same letters and numerals ot reference indicate the same parts in all the iigures.

In the drawings, d represents the cylinder of a locomotive, and h the piston therein.

c represents the casing of my improved cylinder-cock. Said casing has a longitudinal cylindrical chamber 2, in which are fitted to reciprocate two valves d CZ', which are connected by a stern e.

f f represent inlet-passages, which are connected by pipes with the opposite ends of the cylinder, said passages communicating with the opposite ends of the chamber 2. From the center of the chamber 2 extends an outlet-passage 3, which connects said chamber with the seat of a rotary valve l, which is located in an arm or branch of the casing c, through which the water of condensation from the cylinders escapes.

6 6 represent ports in the chamber 2 at opposite sides ot the central outlet-passage 3. W'ith said ports communicate passages 7 7', which extend from the ends ot" the chamber 2.

The valves CZ d' are formed so that when at the extreme of their movement (shown in Fig. 2) the valve (l will close the port G, and at the same time the opening d" between the valves d CZ' will coincide with the outlet-passage 3 and port G', so that water escaping from the right-hand end of the cylinder through the pipe f' will pass through the passage 7', port 6', and outlet-passage 3. The valves are held in the position shown in Fig. 2 by steam-pressure in the left-hand end ot the cylinder, said pressure forcing the Valve d' outwardly toward one end ot the chamber 2 and the valve d inwardly toward the center of said chamber. When the piston is moving in the opposite direction by the admission of steam to the rightwhand end of thecylinder, the valves CZ CZ' will be reversed, and the valve d' will .close the port 6' and the opening c will connect the port 6 with the outlet-passage 3, so that water from the lefthand end of the cylinder through the pipe f will pass to the outlet-passage 3 through the passage 7, port G, and openinO d.

The movement of the valves d CZ is limited by stop-studs 't' z" at the ends of the chamber 2, said studs coinciding with cavities or dashpots jj' in the outer ends of the valves. Said studs and dash-pots cushion the valves at the ends of their movements and prevent them from striking violently against their stops.

The outlet-valve et is provided with a central port 8, which is arranged to coincide with the outlet-passage 3 when the valve 4 is turned to the position shown in Fig. 2, the water trom both ends of the cylinder passing through said port 8. f

Extending through the valve at at opposite sides of the port 8 and arranged at a suitable ICO angle therewith, as hereinafter described, are

the ports 9 9', which are arranged to coincide with the passages 7 7 when the valve 4 is turned to the position shown in Fig. 3. This adj ustmentof the valve 4 provides two continuously-open outlets, so thatwater and steam from both ends of the cylinder may escape without hin derance by the valves CZ d', or either of them, the Water, duc., from one end of the cylinder passing through the pipe f around the stop-stud t', and through the passage 7 and port 9, while the water from the other end of the cylinder passes through the pipe f around the stud t" and through the passage 7' and port 9'. Vhen the valve 4 is in the position shown in Fig. 2, the passages 7 7' are closed, so that the water from the cylinder is obliged to pass through the central passage 3 by the described operation of the valves d CZ'. The valve 4 may be moved by devices connecting itwith the cab of the engine, and said devices may be similar to those now in use for operating ordinary cylinder-cocks, the en gine-man being enabled to give a continuons outlet to each end of the cylinder by turning the valve to the position shown in Fig. 3, and an alternating outlet by turning the valve to the position shown in Fig. 2.

It will be seen that the arrangement of passages and ports and the construction of the valve 4, whereby the valves d d' are made inoperative when the valve 4 is one position and operative when the valve 4 is in another position, enables the device to be converted readily from a cock which automatically atfords an outlet from each end of the cylinder alternately to one which affords an outlet from each end at the same time, and vice versa. It it is not desired to provide two simultaneously-open outlets, the passages 7 7 may be extended only to the ports G 6', so that there will be no escape for water from the` cylinder excepting through the central outlet 3. The ports 9 Qare arranged at such an anglerelatively to the port S that the valve 4 may be adjusted so that it will simultaneously close the ports S and 9 9', thus preventing any escape through the cylindercock. The valve 4 is` adjusted as last described after the engine has been running so long that the condensation in the cylinders is reduced to the minimum, so that the wainlet-passages ff', the cylindrical chamberV 2, communicating with said passages and eX- tending continuously between them, the outlet-passage 3, extending from the center ot' said chamber, the ports G 6 in the chamber at opposite sides of the outlet-passage, the rigidly-connected cylindrical valves d d', closely fitting and movable in the chamber 2 and having an opening between them adapted to connect either ot said ports with the outlet-passage, the other valve at the same time closing the other port, and the passages 7 7', formed in the casin g outside of the chamber 2 and communicating withthe inlet-passages ff' and with the ports 6 6',-as set forth;

2. The improved cylinder-cock having the chamber 2, the inlet-passages f and f at the ends oi' said chamber, the outlet-passage 3, extending from the center of said chamber, the ports 6 G' in the chamber at opposite sides of the outlet-passage, the rigidly-connected valves d d', movable in the chamber 2 and having an opening between them adapted to connect either of said ports with the outletpassage, the other valve at the same time closing the other port, and the passages 7 7', communicating with the inletpassages ff' and with the ports l5 G', said passages 7 7 being extended into the outlet branch of the casing of the cock, and the rotary valve 4 in said branch having a transverse port S, adapted to coincide With the outlet-passage 3 when the valve is in one position and with the ports 9 9', adapted to co-A incide with the passages 7 7 when the valve is in another position, as set forth.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 16th day of January, A. I). 1890.

FRED B. HOW.

Witnesses:

C. F. BROWN, W. C. RAMsAY. 

